JP7709588B2 - Battery cell, battery, power consumption device, and method and apparatus for manufacturing battery cell - Google Patents

Description

This application relates to the field of battery technology, and in particular to battery cells, batteries, power consumption devices, and methods and equipment for manufacturing battery cells.

Energy conservation and reducing pollutant emissions are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy conservation and environmental protection advantages, have become an important component of the sustainable development of the automotive industry. Battery technology is a key factor in the development of electric vehicles.

In the development of battery technology, in addition to improving battery performance, safety issues are also an issue that cannot be ignored. If the safety of a battery cannot be guaranteed, the battery cannot be used. Therefore, how to strengthen the safety of batteries is one of the technical issues in battery technology that awaits an immediate solution.

The object of this application is to provide a battery cell, a battery, a power consumption device, a method for manufacturing a battery cell, and an apparatus. This battery cell has a relatively high level of safety.

According to a first aspect, the present application provides a battery cell, the battery cell comprising: a housing including a wall; an electrode terminal insulated from and attached to the wall; an electrode assembly installed in the housing and including a main body and a first tab, the first tab being formed at an end of the main body close to the wall; a current collecting part installed between the first tab and the wall for connecting the first tab and the electrode terminal; and a first insulating member installed between the current collecting part and the wall for insulating and isolating the current collecting part and the wall, wherein a protrusion is formed on the side of the first insulating member facing the current collecting part, and the projection of the protrusion on the current collecting part in the thickness direction of the wall does not overlap with the projection of the electrode terminal on the current collecting part.

For the battery cell of the present application, by forming a protrusion on the side of the first insulating member facing the current collecting component, in the process of assembling the electrode assembly into the housing, the protrusion can limit the warping of the current collecting component toward the wall, thereby limiting deformation toward the wall of the electrode assembly, preventing short circuits and thermal runaway in the battery cell due to the occurrence of misalignment between the plates of the electrode assembly, and improving the safety of the battery cell.

In some embodiments of the present application, the current collecting part includes a central portion and a peripheral portion, the projection of the electrode terminal on the current collecting part is located in the central portion, and the projection of the protrusion on the current collecting part is located in the peripheral portion.

In the above solution, during the process of assembling the electrode assembly into the housing, the electrode terminal abuts the center and the protrusion abuts the peripheral portion, thereby providing stoppers and support for the peripheral portion and limiting the bending of the peripheral portion toward the wall portion, thereby limiting short circuits and thermal runaway in the battery cell caused by misalignment between the plates of the outer ring of the electrode assembly and improving the safety of the battery cell.

In some embodiments of the present application, the minimum distance from the protrusion to the outer peripheral surface of the current collecting part in the radial direction of the electrode terminal is smaller than the minimum distance from the protrusion to the outer peripheral surface of the electrode terminal.

In the above solution, since there is a high probability of the outer ring plate of the electrode assembly becoming misaligned and the amount of misalignment is large, the protrusion is installed relatively close to the outer surface of the current collecting part and relatively far from the outer surface of the electrode terminal, so that the protrusion can act as a stopper and support for the plate that is relatively far from the electrode terminal, i.e., the outer ring plate, thereby reducing the probability of the outer ring plate becoming misaligned and preventing short circuits and thermal runaway in the battery cell due to the outer ring plate misalignment, thereby improving the safety of the battery cell.

In some embodiments of the present application, there is a gap between the protrusion and the current collecting part along the thickness direction of the wall portion.

In the above solution, since the electrode terminal needs to abut against the current collecting part to achieve electrical connection, by providing a certain gap between the protrusion and the current collecting part, it is possible to prevent the protrusion from interfering with the connection between the electrode terminal and the current collecting part, and to ensure the stability of the electrical connection between the electrode terminal and the current collecting part.

In some embodiments of the present application, the protrusion is an annular protrusion disposed around the central axis of the electrode terminal, or the number of the protrusions is multiple and the multiple protrusions are distributed at intervals around the central axis of the electrode terminal.

In the above solution, the annular protrusions act as stoppers and supports on the outer ring plates and separators of the electrode assembly, and the problem of plate misalignment at localized locations is unlikely to occur. By distributing multiple protrusions at intervals around the central axis of the electrode terminal, the material required for the first insulating member is reduced, making it less difficult to form the first insulating member.

In some embodiments of the present application, the battery cell further includes an insulating film that covers the first tab and the outer peripheral surface of the body and extends between the protrusion and the current collecting component.

In the above solution, by covering the outer periphery of the first tab and the main body with an insulating film, the insulating film serves to insulate and isolate the first tab and the main body from the housing, reducing the probability of short-circuiting between the first tab and the main body and the housing, and further reducing the risk of short-circuiting the battery cell and improving the safety of the battery cell. At the same time, the insulating film extends between the protrusion and the current collecting part, allowing the protrusion and the current collecting part to press the insulating film, preventing the insulating film from moving, and improving the stability of the insulating film covering the current collecting part, the first tab and the main body.

In some embodiments of the present application, the housing includes a case and an end cap, the case includes a bottom wall and a side wall, the side wall is arranged around the periphery of the bottom wall, one end of the side wall is connected to the bottom wall, and the other end of the side wall surrounds the bottom wall to form an opening facing the bottom wall, the end cap covers the opening, and the wall portion is the bottom wall or the end cap.

In the above solution, the bottom wall and side walls define a space to accommodate the electrode assembly, electrolyte, and other structures, and the opening surrounded by the side walls is covered with an end cap to ensure the sealing of the housing.

In some embodiments of the present application, the electrode assembly further includes a second tab, the second tab being formed at an end of the body away from the wall, the second tab being of opposite polarity to the first tab, and the second tab being electrically connected to the wall.

In the above solution, the first tab and the second tab are located at both ends of the electrode assembly, and there is relatively good insulation between the first tab and the second tab, which reduces the risk of short circuiting the battery cell and improves the safety of the battery cell.

According to a second aspect, the present application provides a battery, the battery including the battery cell described above.

According to a third aspect, the present application provides an electrical power consumption device, the device including a battery as described above, the battery being adapted to provide electrical energy.

According to a fourth aspect, the present application provides a method for manufacturing a battery cell, the method including: providing a housing and an electrode terminal, the housing including a wall portion, the electrode terminal being insulated from and attached to the wall portion; providing an electrode assembly, the electrode assembly including a body and a first tab, the first tab being formed on an end of the body that is close to the wall portion; providing a current collecting part; providing a first insulating member, the first insulating member having a protrusion formed on a side facing the current collecting part, the projection of the protrusion on the current collecting part in the thickness direction of the wall portion not overlapping with the projection of the electrode terminal on the current collecting part; connecting the current collecting part to the first tab, installing the first insulating member on the wall portion and moving the protrusion away from the wall portion; placing the electrode assembly in the housing; and connecting the current collecting part to the electrode terminal.

According to a fifth aspect, the present application provides a battery cell manufacturing apparatus, the apparatus including: a first supply device for supplying a housing and an electrode terminal, the housing including a wall portion, and the electrode terminal is attached to the wall portion in an insulated manner; a second supply device for supplying an electrode assembly, the electrode assembly including a body and a first tab, the first tab being formed on an end of the body close to the wall portion; a third supply device for supplying a current collecting part; a fourth supply device for supplying a first insulating member, the first insulating member having a protrusion formed on a side facing the current collecting part, the projection of the protrusion on the current collecting part in the thickness direction of the wall portion not overlapping with the projection of the electrode terminal on the current collecting part; and an assembly device for connecting the current collecting part to the first tab, installing the first insulating member on the wall portion, and moving the protrusion away from the wall portion, placing the electrode assembly in the housing, and connecting the current collecting part to the electrode terminal.

In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. It is obvious that the drawings described below merely illustrate some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without making creative efforts.

1 is a schematic diagram of a vehicle according to an embodiment of the present application. FIG. 1 is a structural schematic diagram of a battery according to an embodiment of the present application. FIG. 2 is an exploded view of a battery cell according to one embodiment of the present application. FIG. 2 is a cross-sectional view of a battery cell according to one embodiment of the present application. FIG. 2 is a locally enlarged view of a portion A of a battery cell according to an embodiment of the present application. 1 is a schematic diagram of an annular protrusion formed on a first insulating member according to an embodiment of the present application. 2 is a schematic diagram of a plurality of protrusions formed on a first insulating member according to an embodiment of the present application. 1 is a schematic diagram showing the coating of the outer circumferential surface of the first tab and the main body with an insulating film according to one embodiment of the present application. FIG. 13 is a local enlarged view of a portion B according to an embodiment of the present application. FIG. 1 is a schematic diagram of a battery cell according to one embodiment of the present application. 1 is a schematic diagram of a method for manufacturing a battery cell according to an embodiment of the present application. FIG. 2 is a schematic diagram of a battery cell manufacturing apparatus according to an embodiment of the present application.

The following describes the embodiments of the present application in more detail, with reference to the drawings and examples. The detailed description of the examples and the drawings are provided to illustratively explain the principles of the present application, but are not intended to limit the scope of the present application, i.e., the present application is not limited to the described examples.

In the description of this application, it should be explained that unless otherwise specified, the meaning of "plurality" is two or more, and the orientation or positional relationship indicated by the terms "up," "down," "left," "right," "inside," "outside," etc. is merely for the convenience and simplification of the description of this application, and does not indicate or imply that the device or element referred to has a particular orientation, must be configured and operated in a particular orientation, and should not be understood as a limitation on this application. In addition, the terms "first," "second," "third," etc. are used for explanatory purposes only, and should not be understood as indicating or implying relative importance. "Perpendicular" is not strictly perpendicular, but has a margin of error. "Parallel" is not strictly parallel, but has a margin of error.

All terms indicating orientations appearing in the following description are the directions shown in the drawings and do not limit the specific structure of this application. In the description of this application, it should be further explained that unless otherwise clearly defined or limited, the terms "attached," "connected," and "connected" should be understood in a broad sense, and may be, for example, a fixed connection, a removable connection, an integral connection, a direct connection, or an indirect connection via an intermediate medium. Those skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the specific situation.

In this application, the battery referred to refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack, etc.

The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell is mainly operated by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector without the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector without the positive electrode active material layer is called a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector on which the negative electrode active material layer is not coated protrudes from the negative electrode collector on which the negative electrode active material layer is coated, and the negative electrode collector on which the negative electrode active material layer is not coated is called a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that the positive electrode tabs do not melt even when a large current is applied, the number of positive electrode tabs is multiple and stacked, and the number of negative electrode tabs is multiple and stacked. The material of the separator may be PP (Polypropylene) or PE (Polyethylene), etc.

Currently, in view of the development of the market situation, the applications of power batteries are becoming more and more widespread. Power batteries are not only used in energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but are also widely used in multiple fields such as electric transportation devices such as electric bicycles, electric motorcycles and electric cars, as well as military equipment and aerospace. As the application fields of power batteries continue to expand, the market demand for them also continues to increase.

The inventors have noted that in the process of assembling the electrode assembly into the housing, a force must be applied to the electrode assembly along the axial direction of the electrode assembly to bring the current collecting part (connected to one end of the electrode assembly) into contact with the electrode terminal. Because the diameters of the current collecting part and the electrode assembly are larger than the diameter of the electrode terminal, the electrode terminal can only act as a stopper and support for the current collecting part and the electrode assembly at the portion where it abuts, and other parts of the current collecting part and the electrode assembly cannot provide effective stopper and support.

In wound electrode assemblies, the electrode terminals cannot stop and support the outer ring electrode plates and separators of the electrode assembly (the portions where the projections of the electrode plates and separators on the current collectors do not overlap with the projections of the electrode terminals on the current collectors), so when the electrode assembly is assembled into the housing, the current collectors warp, causing the outer ring electrode plates to shift. The shift in the electrode plates can cause a short circuit in the battery cell and induce thermal runaway, posing a very large potential safety risk and seriously affecting the safety of the battery.

Based on the above considerations, in order to reduce the probability of plate misalignment during the process of mounting the electrode assembly to the housing, the inventor, through in-depth research, has designed a battery cell, which includes a housing, the housing includes a wall (located at one end of the housing), a first insulating member is installed between the current collecting part and the wall, and a protrusion is formed on the side of the first insulating member facing the current collecting part, and the projection of the protrusion on the current collecting part in the thickness direction of the wall does not overlap with the projection of the electrode terminal on the current collecting part.

In such a battery cell, by forming a protrusion on the side of the first insulating member facing the current collecting component, in the process of assembling the electrode assembly into the housing, the protrusion can limit the warping of the current collecting component toward the wall to a certain extent, thereby limiting the deformation of the electrode assembly toward the wall, preventing short circuits and thermal runaway in the battery cell due to the occurrence of misalignment between the plates of the electrode assembly, and improving the safety of the battery cell.

The embodiment of the present application provides a power consumption device that uses a battery as a power source, and the power consumption device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a steamship, a spacecraft, etc. Here, the electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric steamship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

In the following examples, for ease of explanation, the power consumption device in the examples of this application will be described as a vehicle.

As shown in FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range extender vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000, for example, the battery 100 can be an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for starting the vehicle 1000, navigation and operating power consumption needs during driving.

In some embodiments of the present application, the battery 100 can be used not only as an operating power source for the vehicle 1000, but also as a drive power source for the vehicle 1000, providing drive power to the vehicle 1000 in place of or in place of fuel oil or natural gas.

As shown in FIG. 2, FIG. 2 is a structural schematic diagram of a battery 100 according to some embodiments of the present application. The battery 100 includes a housing 20 and a battery cell 10, and the battery cell 10 is accommodated in the housing 20. Here, the housing 20 is used to provide an accommodation space for the battery cell 10, and the housing 20 may adopt various structures. In some embodiments, the housing 20 may include a first sub-housing 21 and a second sub-housing 22, and the first sub-housing 21 and the second sub-housing 22 are covered with each other, and the first sub-housing 21 and the second sub-housing 22 together define an accommodation space for accommodating the battery cell 10. The second sub-housing 22 may be a hollow structure with one end open, and the first sub-housing 21 may be a plate-like structure. The first sub-housing 21 is placed over the opening side of the second sub-housing 22, and the first sub-housing 21 and the second sub-housing 22 define a storage space together. The first sub-housing 21 and the second sub-housing 22 may each have a hollow structure with one side open, and the opening side of the first sub-housing 21 is placed over the opening side of the second sub-housing 22. Of course, the housing 20 formed by the first sub-housing 21 and the second sub-housing 22 may have various shapes, such as a cylinder or a rectangular parallelepiped.

In the battery 100, the battery cells 10 may be multiple, and the multiple battery cells 10 may be connected in series, parallel, or series-parallel. The series-parallel connection refers to not only the series connection but also the parallel connection among the multiple battery cells 10. The multiple battery cells 10 may be directly connected in series, parallel, or series-parallel to each other, and then the entire structure of the multiple battery cells 10 is housed in the housing 20. Of course, the battery 100 may be a battery module formed by first connecting the multiple battery cells 10 in series, parallel, or series-parallel, and then connecting the multiple battery modules in series, parallel, or series-parallel to form a single battery module and housed in the housing 20. The battery 100 may further include other structures, for example, the battery 100 may further include bus bar members for realizing electrical connection between the multiple battery cells 10.

Here, each battery cell 10 may be a secondary battery or a primary battery, and may further be, but is not limited to, a lithium-sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 10 may have a cylindrical shape, a flat shape, a rectangular shape, or other shapes.

As shown in FIG. 3, FIG. 3 is an exploded view of a battery cell 10 according to some embodiments of the present application. The battery cell 10 refers to the smallest unit that constitutes the battery 100. As shown in FIG. 3, the battery cell 10 includes a housing 11, an electrode assembly 13, and other functional members.

The housing 11 is an assembly for forming an internal environment of the battery cell 10, and the internal environment formed by the housing 11 may be used to accommodate the electrode assembly 13, the electrolyte, and other components. The housing 11 may have various shapes and sizes, for example, a cylindrical shape, a rectangular parallelepiped shape, a hexagonal prism shape, etc. Specifically, the shape of the housing 11 may be determined according to the specific shape and size of the electrode assembly 13. The material of the housing 11 may be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

The electrode assembly 13 is a component in which an electrochemical reaction occurs within the battery cell 10. The housing 11 may include one or more electrode assemblies 13. The electrode assembly 13 is formed by mainly winding or stacking a positive electrode plate and a negative electrode plate, and generally a separator is provided between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate that have active material constitute the body 132 of the electrode assembly 13, and the parts of the positive electrode plate and the negative electrode plate that do not have active material constitute tabs. The positive electrode tab and the negative electrode tab may both be located at one end of the body 132, or may be located at both ends of the body 132. In the charge and discharge process of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals 12 to form a current circuit.

As shown in FIG. 3, the present application provides a battery cell 10, which includes a housing 11, an electrode terminal 12, an electrode assembly 13, a current collecting part 14, and a first insulating member 15.

As shown in FIG. 4, FIG. 4 is a cross-sectional view of a battery cell of some embodiments of the present application. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is attached to the wall portion 11a in an insulated manner. The electrode assembly 13 is installed in the housing 11, and the electrode assembly 13 includes a body 132 and a first tab 131, and the first tab 131 is formed at an end of the body 132 close to the wall portion 11a. The current collecting part 14 is installed between the electrode assembly 13 and the wall portion 11a, and the current collecting part 14 is used to connect the first tab 131 and the electrode terminal 12. The first insulating member 15 is installed between the current collecting part 14 and the wall portion 11a, and is used to insulate and isolate the current collecting part 14 from the wall portion 11a. Here, a protrusion 151 is formed on the side of the first insulating member 15 facing the current collecting part 14, and the projection of the protrusion 151 on the current collecting part 14 in the thickness direction of the wall part 11a does not overlap with the projection of the electrode terminal 12 on the current collecting part 14.

To reduce the risk of a short circuit within the battery cell 10, components of the battery cell 10 with different polarities should be insulated and isolated from each other. For example, the electrode terminal 12 and the wall 11a, the current collecting part 14 and the wall 11a, and the first tab 131 and the housing 11 should all be insulated and isolated from each other.

As shown in FIG. 4, a first insulating member 15 is installed between the current collecting part 14 and the wall portion 11a to insulate and isolate the current collecting part 14 from the wall portion 11a.

The fact that the electrode terminal 12 is attached in an insulated manner to the wall portion 11a may be understood to mean that an insulating structure is similarly provided between the electrode terminal 12 and the wall portion 11a, thereby insulating and isolating the electrode terminal 12 from the wall portion 11a.

For example, in some embodiments of the present application, the first insulating member 15 may extend between the electrode terminal 12 and the wall portion 11a to insulate and isolate the electrode terminal 12 and the wall portion 11a.

For example, as shown in FIG. 4, in some other embodiments of the present application, the battery cell 10 may further include a second insulating member 17, which is disposed between the electrode terminal 12 and the wall portion 11a to insulate and isolate the electrode terminal 12 and the wall portion 11a, and the first insulating member 15 is disposed between the current collecting part 14 and the wall portion 11a to insulate and isolate the current collecting part 14 and the wall portion 11a.

In an embodiment in which the battery cell 10 may further include a second insulating member 17, the first insulating member 15 and the second insulating member 17 may be integrally molded. Such an installation method reduces the number of components, compacts the structure of the battery cell 10, and facilitates the installation and positioning of the first insulating member 15 and the second insulating member 17, simplifying the assembly process of the battery cell 10 and improving the production efficiency of the battery cell 10. In some other embodiments of the present application, the first insulating member 15 and the second insulating member 17 may be further installed separately.

The material of the first insulating member 15 and the second insulating member 17 may be plastic, such as PVC (Polyvinyl chloride) or PP (Polypropylene), or the material of the first insulating member 15 may further be rubber, such as butylene rubber, styrene butadiene rubber, silicone rubber, etc.

The electrode assembly 13 further includes a second tab 133, which has a polarity opposite to that of the first tab 131. The electrode assembly 13 is formed by winding an electrode plate and a separator. Specifically, the electrode plate includes a positive electrode plate and a negative electrode plate, and the positive electrode plate and the negative electrode plate are separated by a separator. The parts of the positive electrode plate and the negative electrode plate that have active material constitute the main body 132, and the parts of the positive electrode plate and the negative electrode plate that do not have active material are used to constitute the positive electrode tab and the negative electrode tab, respectively. For example, the first tab 131 may be a positive electrode tab and is constituted by the part of the positive electrode plate that does not have active material, and the second tab may be a negative electrode tab and is constituted by the part of the negative electrode plate that does not have active material. Alternatively, the first tab 131 may be a negative electrode tab and is made up of a portion of the negative electrode plate that does not have active material, and the second tab may be a positive electrode tab and is made up of a portion of the positive electrode plate that does not have active material.

The current collecting part 14 is used to connect the first tab 131 and the electrode terminal 12. This means that the first tab 131 and the electrode terminal 12 are both connected to the current collecting part 14, and an electrical connection is realized between the first tab 131 and the electrode terminal 12 via the current collecting part 14.

Furthermore, the fact that the projection of the protrusion 151 on the current collecting part 14 does not overlap with the projection of the electrode terminal 12 on the current collecting part 14 indicates that the positions of the protrusion 151 and the electrode terminal 12 are misaligned.

For the battery cell 10 of the present application, by forming a protrusion 151 on the side of the first insulating member 15 facing the current collecting part 14, in the process of assembling the electrode assembly 13 into the housing, the protrusion 151 can limit the warping of the current collecting part 14 toward the wall 11a, thereby limiting the deformation of the electrode assembly 13 toward the wall 11a, preventing short circuits and thermal runaway in the battery cell 10 due to the occurrence of misalignment between the plates of the electrode assembly 13, and improving the safety of the battery cell 10.

At the same time, the first insulating member 15 further provides insulation and isolation between the current collecting part 14 and the wall portion 11a, and the same first insulating member 15 achieves different functions, reducing the number of components and making the structure of the battery cell 10 compact.

As shown in FIG. 4, in some embodiments of the present application, the current collecting part 14 includes a central portion 141 and a peripheral portion 142, and the projection of the electrode terminal 12 on the current collecting part 14 is located in the central portion 141, and the projection of the protrusion 151 on the current collecting part 14 is located in the peripheral portion 142.

As shown in FIG. 4, the peripheral portion 142 is disposed around the central portion 141. For example, if the electrode assembly 13 has a wound structure, the projection of the inner ring of the electrode assembly 13 and the separator on the current collector 14 is located at the central portion 141, and the projection of the outer ring of the electrode assembly 13 and the separator on the current collector 14 is located at the peripheral portion 142. When the electrode assembly 13 is assembled into the housing 11, the abutment of the protrusion 151 with the peripheral portion 142 prevents the peripheral portion 142 from warping toward the wall portion 11a, and further prevents the outer ring of the electrode assembly 13 and the separator from moving toward the wall portion 11a, thereby avoiding plate misalignment and reducing the risk of short circuit and thermal runaway in the battery cell.

With this installation method, in the process of assembling the electrode assembly 13 into the housing 11, the electrode terminal 12 abuts against the central portion 141, and the protrusion 151 can abut against the peripheral portion 142, thereby providing a stopper and support for the peripheral portion 142 and limiting the warping of the peripheral portion 142 toward the wall portion 11a, thereby limiting short circuits and thermal runaway in the battery cell 10 caused by the occurrence of misalignment between the outer ring plates of the electrode assembly 13, and improving the safety of the battery cell 10.

As shown in FIG. 4, in some embodiments of the present application, the minimum distance from the protrusion 151 to the outer peripheral surface of the current collecting part 14 in the radial direction of the electrode terminal 12 is smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12.

It should be noted that the minimum distance from the protrusion 151 to the outer peripheral surface of the current collecting part 14 being smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12 means that the minimum distance from the same protrusion 151 to the outer peripheral surface of the current collecting part 14 is smaller than the minimum distance from the same protrusion 151 to the outer peripheral surface of the electrode terminal 12. After determining the position where the protrusion 151 is formed in the first insulating member 15 and the shape of the protrusion 151, the minimum distance from this protrusion 151 to the outer peripheral surface of the current collecting part 14 is smaller than the minimum distance from this protrusion 151 to the outer peripheral surface of the electrode terminal 12.

Because this installation method results in a high probability of the outer ring plate of the electrode assembly 13 becoming misaligned and the amount of misalignment is large, the protrusions 151 are installed relatively close to the outer peripheral surface of the current collecting part 14 and relatively far from the outer peripheral surface of the electrode terminal 12, allowing the protrusions 151 to act as stoppers and support for the plate that is relatively far from the electrode terminal 12, i.e., the outer ring plate, reducing the probability of the outer ring plate becoming misaligned and preventing short circuits and thermal runaway in the battery cell 10 due to the outer ring plate misalignment, thereby improving the safety of the battery cell 10.

As shown in FIG. 5, FIG. 5 is a local enlarged view of some embodiments of the present application at an A-angle. In some embodiments of the present application, there is a gap between the protrusion 151 and the current collecting part 14 along the thickness direction of the wall portion 11a.

When the protrusion 151 comes into contact with the current collecting part 14, during the process of attaching the electrode assembly 13 to the housing, the protrusion 151 generates a force that moves the current collecting part 14 and the electrode assembly 13 away from the wall portion 11a along the axial direction of the electrode assembly 13, increasing the difficulty of attaching the electrode assembly 13 to the housing and reducing the production efficiency of the battery cell 10.

Furthermore, when the protrusion 151 comes into contact with the current collecting part 14, if the size of the protrusion 151 along the thickness direction of the wall portion 11a is too large, the contact between the protrusion 151 and the current collecting part 14 may cause a gap between the current collecting part 14 and the electrode terminal 12, which may affect the stability of the electrical connection between the current collecting part 14 and the electrode terminal 12. Therefore, in order to eliminate the influence of factors such as errors in the production and manufacturing of the protrusion 151, a certain gap may be provided between the protrusion 151 and the current collecting part 14.

This type of installation requires that the electrode terminal 12 abut against the current collecting part 14 to achieve electrical connection. By providing a certain gap between the protrusion 151 and the current collecting part 14, it is possible to prevent the protrusion 151 from interfering with the connection between the electrode terminal 12 and the current collecting part 14, and ensure the stability of the electrical connection between the electrode terminal 12 and the current collecting part 14.

As shown in Figures 6 and 7, Figure 6 is a schematic diagram of an annular protrusion formed on a first insulating member in some embodiments of the present application, and Figure 7 is a schematic diagram of multiple protrusions formed on a first insulating member in some embodiments of the present application. In some embodiments of the present application, the protrusion 151 is an annular protrusion 151 disposed around the central axis of the electrode terminal 12, or the number of protrusions 151 is multiple, and the multiple protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12.

As shown in FIG. 6, in some embodiments of the present application, the protrusion 151 is an annular protrusion 151 disposed around the central axis of the electrode terminal 12. Here, the annular protrusion 151 is not limited to a circular ring, and the annular protrusion 151 may further have an elliptical, rectangular, polygonal, etc. shape, as long as the annular protrusion 151 forms a closed ring that goes around the central axis of the electrode terminal 12.

7, in some embodiments of the present application, the number of the protrusions 151 is more than one, and the protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12. Here, the fact that the protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12 may mean that the protrusions 151 are distributed at intervals on the same circumference around the central axis of the electrode terminal 12, or may mean that the protrusions 151 are distributed at intervals on different circumferences around the central axis of the electrode terminal 12. For example, some of the protrusions 151 are distributed on a first circumference at intervals around the central axis of the electrode terminal 12, and another part of the protrusions 151 are distributed on a second circumference at intervals around the central axis of the electrode terminal 12, the diameter of the first circumference is different from the diameter of the second circumference, and the number of protrusions 151 located on the first circumference may be the same as or different from the number of protrusions 151 located on the second circumference.

When there are multiple protrusions 151, the shape of the protrusions 151 may be cylindrical, prismatic, sectorial, sector-shaped, etc.

It should be noted that the present application does not limit the specific shape and number of the protrusions 151, but rather that the installation of the protrusions 151 provides a force along the axial direction of the electrode assembly 13 to the current collecting member 14 and the plates and separators of the electrode assembly 13, thereby preventing the plates from shifting.

Optionally, in some embodiments of the present application, when a plurality of protrusions 151 are installed, the projection area of the protrusions 151 on the current collecting part 14 that are separated from the electrode terminal 12 is relatively large, and the projection area of the protrusions 151 on the current collecting part 14 that are close to the electrode terminal 12 is relatively small. Since the electrode terminal 12 can provide a certain support for the plate of the electrode assembly 13 that is close to the electrode terminal 12, but cannot provide a support for the plate of the electrode assembly 13 that is separated from the electrode terminal 12, it is necessary to provide more support for the plate of the electrode assembly 13 that is separated from the electrode terminal 12, and therefore, in order to prevent the plate of the electrode assembly 13 that is separated from the electrode terminal 12 from shifting, and correspondingly, to provide a stable support for the plate that is separated from the electrode terminal 12, the projection area of the protrusions 151 on the current collecting part 14 that are separated from the electrode terminal 12 may be relatively large.

Optionally, in some embodiments of the present application, when a plurality of protrusions 151 are installed, the protrusions 151 away from the electrode terminal 12 are relatively densely packed, and the protrusions 151 approaching the electrode terminal 12 are relatively sparsely packed. Similarly, since the electrode terminal 12 can provide a certain support for the plate of the electrode assembly 13 approaching the electrode terminal 12, but cannot provide a support for the plate of the electrode assembly 13 away from the electrode terminal 12, it is necessary to provide more support for the plate of the electrode assembly 13 away from the electrode terminal 12, and therefore, in order to prevent the plate of the electrode assembly 13 away from the electrode terminal 12 from shifting, and correspondingly, to provide a stable support for the plate away from the electrode terminal 12, the protrusions 151 away from the electrode terminal 12 may be installed to be relatively densely packed.

In an embodiment where the protrusion 151 is an annular protrusion 151 installed around the central axis of the electrode terminal 12 by such an installation method, the stopping and supporting action that the annular protrusion 151 performs on the outer ring electrode plates and separator of the electrode assembly 13 is relatively uniform, and the problem of electrode plate misalignment at a local position is unlikely to occur. In an embodiment where there are multiple protrusions 151 and the multiple protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12, the multiple protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12, thereby reducing the material of the first insulating member 15 and making it less difficult to form the first insulating member 15.

As shown in Figures 8 and 9, Figure 8 is a schematic diagram of some embodiments of the present application in which the insulating film covers the outer circumferential surfaces of the first tab and the main body, and Figure 9 is a B-angle local enlarged view of some embodiments of the present application. In some embodiments of the present application, the battery cell 10 further includes an insulating film 16, which covers the outer circumferential surfaces of the first tab 131 and the main body 132 and extends between the protrusion 151 and the current collecting part 14.

To further reduce the risk of short circuiting the battery cell 10, the outer peripheral surfaces of the first tab 131 and the main body 132 must both be insulated and isolated from the housing 11. For this reason, an insulating film 16 is provided to cover the outer peripheral surfaces of the first tab 131 and the main body 132, thereby achieving insulation and isolation between the outer peripheral surfaces of the first tab 131 and the main body 132 and the housing 11.

9, in an embodiment in which there is a gap between the protrusion 151 and the current collecting part 14 along the thickness direction of the wall 11a, the first insulating member 15 does not contact the current collecting part 14, and the effect of insulating and isolating the current collecting part 14 and the wall 11a using only the first insulating member 15 is relatively poor, and there is still a risk of short circuit between the current collecting part 14 and the wall 11a, for example, there is a possibility of short circuit between the outer peripheral surface of the current collecting part 14 and the wall 11a. In order to further improve the effect of insulation and isolation between the current collecting part 14 and the wall 11a and prevent short circuit between the current collecting part 14 and the wall 11a, the insulating film 16 may be extended to between the protrusion 151 and the current collecting part 14, allowing the insulating film 16 to cover the current collecting part 14 and improving the insulation and isolation effect between the current collecting part 14 and the wall 11a.

As shown in FIG. 9, when the insulating film 16 extends between the protrusion 151 and the current collecting part 14, if there is a gap between the protrusion 151 and the current collecting part 14 along the thickness direction of the wall part 11a, the insulating film 16 can fill this gap, and the protrusion 151 can abut against the insulating film 16. In other words, the protrusion 151 and the current collecting part 14 can clamp and press the insulating film 16, thereby preventing the insulating film 16 from moving due to interference from external factors, and allowing the insulating film 16 to stably cover the current collecting part 14, the first tab 131, and the main body 132.

By using this installation method, the insulating film 16 covers the outer periphery of the first tab 131 and the body 132, thereby providing insulation and isolation between the first tab 131 and the body 132 and the housing 11, reducing the probability of a short circuit between the first tab 131 and the body 132 and the housing 11, and further reducing the risk of a short circuit in the battery cell 10, improving the safety of the battery cell 10. At the same time, the insulating film 16 extends between the protrusion 151 and the current collecting part 14, allowing the protrusion 151 and the current collecting part 14 to clamp and press the insulating film 16, preventing the insulating film 16 from moving and improving the stability of the insulating film 16 that covers the current collecting part 14, the first tab 131 and the body 132.

As shown in FIG. 10, FIG. 10 is a schematic diagram of a battery cell 10 of some embodiments of the present application. In some embodiments of the present application, the housing 11 includes a case 111 and an end cap 112, the case 111 includes a bottom wall 1111 and a side wall 1112, the side wall 1112 is arranged around the bottom wall 1111, one end of the side wall 1112 is connected to the bottom wall 1111, and the other end of the side wall 1112 surrounds the bottom wall 1111 to form an opening facing the bottom wall 1111, the end cap 112 covers the opening, and the wall portion 11a is the bottom wall 1111 or the end cap 112.

Here, the bottom wall 1111 and the side wall 1112 may be integrally formed, or the bottom wall 1111 and the side wall 1112 may be installed separately and connected by a method such as welding or locking. Specifically, the side wall 1112 may have a columnar shape, for example, a cylindrical or rectangular column.

The other end of the side wall 1112 facing the bottom wall 1111 is surrounded to form an opening, and the current collecting part 14 and the electrode assembly 13 can be attached to the case 111 through the opening. After the electrode assembly 13 is assembled into the case 111, the opening is covered with the end cap 112 to seal the opening. In addition, it is necessary to inject electrolyte into the housing 11, and when the end cap 112 covers the opening, a sealant, for example, a seal ring or seal gasket, may be installed between the end cap 112 and the side wall 1112, thereby improving the sealability covering the opening of the end cap 112 and preventing the electrolyte from leaking from the housing 11.

The wall 11a being the bottom wall 1111 or the end cap 112 includes two cases. In one case, the wall 11a is the bottom wall 1111, and in another case, the wall 11a is the end cap 112. In an embodiment where the wall 11a is the bottom wall 1111, after the electrode assembly 13 is assembled into the case 111, the current collecting part 14 faces the bottom wall 1111, and the heat shrink film 15 is located between the bottom wall 1111 and the current collecting part 14. In an embodiment where the wall 11a is the end cap 112, after the electrode assembly 13 is assembled into the case 111, the current collecting part 14 faces the end cap 112, and the heat shrink film 15 is located between the end cap 112 and the current collecting part 14.

With this installation method, the bottom wall 1111 and the side wall 1112 define a space for accommodating the electrode assembly 13, electrolyte, and other structures, and the opening surrounded by the side wall 1112 is covered by the end cap 112 to ensure the sealing of the housing 11.

As shown in FIG. 10, in some embodiments of the present application, the electrode assembly 13 further includes a second tab 133, the second tab 133 is formed at an end of the body 132 away from the wall portion 11a, the second tab 133 is of opposite polarity to the first tab 131, and the second tab 133 is electrically connected to the wall portion 11a.

As shown in FIG. 10, the first tab 131 is located at the end of the electrode assembly 13 facing the wall portion 11a, and the second tab 133 is located at the end of the electrode assembly 13 facing away from the wall portion 11a, i.e., the first tab 131 and the second tab 133 are formed at both ends of the body 132 of the electrode assembly 13, respectively.

The first tab 131 has the opposite polarity to the second tab 133. For example, the first tab 131 is a positive electrode tab of the electrode assembly 13, is composed of a portion of the positive electrode plate that does not have active material, and is electrically connected to the current collector 14 and the electrode terminal 12, and the second tab 133 is a negative electrode tab of the electrode assembly 13, is composed of a portion of the negative electrode plate that does not have active material, and is electrically connected to the housing 11 and the wall portion 11a.

With this installation method, the first tab 131 and the second tab 133 are located at both ends of the electrode assembly 13, and there is relatively good insulation between the first tab 131 and the second tab 133, reducing the risk of short circuiting the battery cell 10 and improving the safety of the battery cell 10.

According to a second aspect, the present application further provides a battery 100, which includes the above-mentioned battery cell 10. In the battery cell 10, a protrusion 151 is formed on the side of the first insulating member 15 facing the current collecting part 14, thereby providing a support for the plate of the electrode assembly 13, thereby reducing the probability of plate misalignment in the process of assembling the electrode assembly 13 into the housing, reducing the risk of short circuit and thermal runaway in the battery cell 10, and further improving the safety of the battery 100.

According to a third aspect, the present application further provides an electrical power consumption device, the electrical power consumption device including the battery 100 described above, the battery 100 being used to provide electrical energy.

According to a fourth aspect, as shown in FIG. 11, FIG. 11 is a schematic diagram of a method for manufacturing a battery cell according to some embodiments of the present application. The present application further provides a method for manufacturing a battery cell 10. Specifically, the method for manufacturing the battery cell 10 is as follows.

S100, providing a housing 11 and an electrode terminal 12, the housing 11 including a wall portion 11a, the electrode terminal 12 being attached to the wall portion 11a in an insulated manner;
S200, providing an electrode assembly 13, the electrode assembly 13 including a body 132 and a first tab 131, the first tab 131 being formed at an end of the body 132 adjacent to the wall portion 11a;
S300, providing a current collecting part 14 and connecting the current collecting part 14 to a first tab 131;
S400: supplying a first insulating member 15, forming a protrusion 151 on a side of the first insulating member 15 facing the current collecting part 14, and a projection of the protrusion 151 on the current collecting part 14 in the thickness direction of the wall portion 11a not overlapping with a projection of the electrode terminal 12 on the current collecting part 14;
S500: Installing the first insulating member 15 on the wall portion 11a and separating the protrusion 151 from the wall portion 11a;
S600, inserting the electrode assembly 13 and the current collecting part 14 into the housing 11;
S700, the current collecting part 14 is connected to the electrode terminal 12.

It should be noted that the above manufacturing method of the battery cell 10 is merely an example in the production and manufacturing process of the battery cell 10, and does not represent a specific order in the production and manufacturing process of the battery cell 10. In the production and manufacturing process of the battery cell 10, a specific process flow can be created according to the actual situation.

According to a fifth aspect, as shown in FIG. 12, FIG. 12 is an exemplary diagram of a battery cell manufacturing apparatus according to some embodiments of the present application. The present application further provides a battery cell manufacturing apparatus 2000, which includes a first supply device 2100, a second supply device 2200, a third supply device 2300, a fourth supply device 2400, a first assembly device 2500, a second assembly device 2600, a third assembly device 2700, and a fourth assembly device 2800.

Specifically, the first supply device 2100 is used to supply the housing 11 and the electrode terminal 12, the housing 11 including the wall portion 11a, and the electrode terminal 12 is attached to the wall portion 11a in an insulated manner. The second supply device 2200 is used to supply the electrode assembly 13, the electrode assembly 13 including the body 132 and the first tab 131, the first tab 131 being formed at the end of the body 132 close to the wall portion 11a. The third supply device 2300 is used to supply the current collecting part 14. The fourth supply device 2400 is used to supply the first insulating member 15, and a protrusion 151 is formed on the side of the first insulating member 15 facing the current collecting part 14, and the projection of the protrusion 151 on the current collecting part 14 in the thickness direction of the wall portion 11a does not overlap with the projection of the electrode terminal 12 on the current collecting part 14. The first assembly device 2500 is used to connect the current collecting part 14 to the first tab 131. The second assembly device 2600 is used to install the first insulating member 15 on the wall 11a and move the protrusion 151 away from the wall 11a. The third assembly device 2700 is used to insert the electrode assembly 13 and the current collecting part 14 into the housing 11. The fourth assembly device 2800 is used to connect the current collecting part 14 to the electrode terminal 12.

In some embodiments of the present application, as shown in Figs. 3 to 9, the present application provides a battery cell 10. The battery cell 10 includes a housing 11, an electrode terminal 12, an electrode assembly 13, a current collecting part 14, and a first insulating member 15. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is attached to the wall portion 11a in an insulated manner. The electrode assembly 13 is installed in the housing 11, and includes a body 132 and a first tab 131, and the first tab 131 is formed at an end of the body 132 close to the wall portion 11a. The current collecting part 14 is installed between the electrode assembly 13 and the wall portion 11a, and the current collecting part 14 is used to connect the first tab 131 and the electrode terminal 12. The first insulating member 15 is installed between the current collecting part 14 and the wall portion 11a, and is used to insulate and isolate the current collecting part 14 from the wall portion 11a. Here, a protrusion 151 is formed on the side of the first insulating member 15 facing the current collecting part 14, and the projection of the protrusion 151 on the current collecting part 14 in the thickness direction of the wall part 11a does not overlap with the projection of the electrode terminal 12 on the current collecting part 14. The projection of the protrusion 151 on the current collecting part 14 is located in the peripheral part 142, and the projection of the electrode terminal 12 on the current collecting part 14 is located in the central part 141, and the minimum distance from the protrusion 151 to the outer peripheral surface of the current collecting part 14 is smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12. There is a certain gap between the protrusion 151 and the current collecting part 14. The outer peripheral surfaces of the first tab 131 and the main body 132 of the electrode assembly 13 are covered with an insulating film 16, and the insulating film extends to between the protrusion 151 and the current collecting part 14.

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and equivalents may be substituted for the components therein without departing from the scope of the present application. In particular, the technical features of each section mentioned in each embodiment may be combined in any manner unless there is a structural contradiction. The present application is not limited to the specific embodiments disclosed, but includes all technical solutions falling within the scope of the claims.

In the drawings, the drawings are not drawn to scale.

Explanation of symbols: 10-battery cell, 11-housing, 11a-wall portion, 111-case, 1111-bottom wall, 1112-side wall, 112-end cap, 12-electrode terminal, 13-electrode assembly, 131-first tab, 132-main body, 133-second tab, 14-current collecting part, 141-center portion, 142-periphery, 15-first insulating member, 151-protrusion, 16-insulating film, 17-second insulating member, 20-casing, 21 -First sub-housing, 22-second sub-housing, 100-battery, 200-controller, 300-motor, 1000-vehicle, 2000-battery cell manufacturing equipment, 2100-first supply device, 2200-second supply device, 2300-third supply device, 2400-fourth supply device, 2500-first assembly device, 2600-second assembly device, 2700-third assembly device, 2800-fourth assembly device.

Claims (12)

A battery cell,
a housing including a wall;
an electrode terminal attached to the wall portion in an insulated manner;
an electrode assembly disposed within the housing, the electrode assembly including a body and a first tab, the first tab being formed on an end of the body adjacent to the wall;
a current collecting part disposed between the first tab and the wall portion for connecting the first tab and the electrode terminal;
a first insulating member disposed between the current collecting part and the wall portion for insulating and isolating the current collecting part from the wall portion,
a projection is formed on a side of the first insulating member facing the current collecting component, a projection of the projection on the current collecting component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component,
A battery cell, wherein the collecting part includes a central portion and a peripheral portion, a projection of the electrode terminal on the collecting part is located in the central portion, and a projection of the protrusion on the collecting part is located in the peripheral portion. A battery cell,
a housing including a wall;
an electrode terminal attached to the wall portion in an insulated manner;
an electrode assembly disposed within the housing, the electrode assembly including a body and a first tab, the first tab being formed on an end of the body adjacent to the wall;
a current collecting part disposed between the first tab and the wall portion for connecting the first tab and the electrode terminal;
a first insulating member disposed between the current collecting part and the wall portion for insulating and isolating the current collecting part from the wall portion,
a projection is formed on a side of the first insulating member facing the current collecting component, a projection of the projection on the current collecting component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component,
a minimum distance from the protrusion to an outer peripheral surface of the current collecting part in a radial direction of the electrode terminal is smaller than a minimum distance from the protrusion to the outer peripheral surface of the electrode terminal. The battery cell according to claim 1 , wherein a gap is provided between the protrusion and the current collecting part along a thickness direction of the wall portion. the protrusion is an annular protrusion disposed around a central axis of the electrode terminal,
The battery cell according to claim 1 , wherein the number of the protrusions is more than one , and the protrusions are distributed at intervals around a central axis of the electrode terminal. 5. The battery cell according to claim 1, further comprising an insulating film that covers the first tab and an outer peripheral surface of the body and extends between the protrusion and the current collecting part. 6. The battery cell according to claim 1, wherein the housing includes a case and an end cap, the case includes a bottom wall and a side wall, the side wall is arranged around the bottom wall, one end of the side wall is connected to the bottom wall and the other end of the side wall surrounds the bottom wall to form an opening facing the bottom wall, the end cap covers the opening, and the wall portion is the bottom wall or the end cap. 7. The battery cell of claim 1, wherein the electrode assembly further includes a second tab, the second tab being formed at an end of the body away from the wall, the second tab being of opposite polarity to the first tab, and the second tab being electrically connected to the wall. A battery comprising a battery cell according to any one of claims 1 to 7 . 10. A power consuming device comprising a battery according to claim 8 , said battery being used to provide electrical energy. A method for manufacturing a battery cell, comprising:
providing a housing and an electrode terminal, the housing including a wall portion, the electrode terminal being insulatively mounted relative to the wall portion;
providing an electrode assembly, the electrode assembly including a body and a first tab, the first tab formed on an end of the body adjacent the wall;
providing a current collecting piece and connecting the current collecting piece to the first tab;
providing a first insulating member, a protrusion being formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion not overlapping with a projection of the electrode terminal on the current collecting component;
placing the first insulating member on the wall portion and moving the protrusion away from the wall portion;
placing the electrode assembly and the current collecting piece in the housing;
connecting the current collecting part to the electrode terminal ;
A method for manufacturing a battery cell, wherein the collecting part includes a central portion and a peripheral portion, a projection of the electrode terminal on the collecting part is located in the central portion, and a projection of the protrusion on the collecting part is located in the peripheral portion . A method for manufacturing a battery cell, comprising:
providing a housing and an electrode terminal, the housing including a wall portion, the electrode terminal being insulatively mounted relative to the wall portion;
providing an electrode assembly, the electrode assembly including a body and a first tab, the first tab formed on an end of the body adjacent the wall;
providing a current collecting piece and connecting the current collecting piece to the first tab;
providing a first insulating member, a protrusion being formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion not overlapping with a projection of the electrode terminal on the current collecting component;
placing the first insulating member on the wall portion and moving the protrusion away from the wall portion;
placing the electrode assembly and the current collecting piece in the housing;
connecting the current collecting part to the electrode terminal ;
a minimum distance from the protrusion to an outer peripheral surface of the current collecting part in a radial direction of the electrode terminal is smaller than a minimum distance from the protrusion to the outer peripheral surface of the electrode terminal . A battery cell manufacturing device comprising:
a first supply device for supplying a housing and an electrode terminal, the housing including a wall portion, the electrode terminal being insulatedly attached to the wall portion;
a second supply device for supplying an electrode assembly, the electrode assembly including a body and a first tab, the first tab being formed on an end of the body adjacent the wall;
a third supply device for supplying the current collecting parts;
a fourth supply device for supplying a first insulating member, the fourth supply device having a protrusion formed on a side of the first insulating member facing the current collecting part, the fourth supply device having a protrusion such that a projection of the protrusion on the current collecting part in a thickness direction of the wall portion does not overlap a projection of the electrode terminal on the current collecting part;
a first assembly device for connecting the current collecting piece to the first tab;
a second assembly device for mounting the first insulating member to the wall and for moving the protrusion away from the wall;
a third assembly device for inserting the electrode assembly into the housing;
a fourth assembly device for connecting the current collecting part to the electrode terminal ;
A battery cell manufacturing apparatus, wherein the current collecting part includes a central portion and a peripheral portion, a projection of the electrode terminal on the current collecting part is located in the central portion, and a projection of the protrusion on the current collecting part is located in the peripheral portion .